An introduction to electron optics / byL. Jacob, Foreword by Sir Clifford C. Paterson. Jacob, L. (Louis) Electron optics. QC447 .J3 537.56 JAC Includes bibliographic references and index. London : Methuen & Co. ; New York : Wiley, c1951. c1951. 1951 Text x, 150 p. : eng Methuen's monographs on physical subjects